You can bring the following into Timor-Leste:
Alcohol 2.5L of any type
Money Declare amounts between US$5,000–10,000. Higher amounts require authorisation from the Central Bank of Timor-Leste (info@bancocentral). For restrictions on taking cash out of the country, contact the Central Bank.
Australians, Irish and British visitors must pay for a visa on arrival at Dili's airport or seaport; US$30 for 30 days. Most other EU nationals are free. Most nationalities need a visa in advance for land border arrivals. Always ask for a 30-day visa, even if you don’t plan on staying that long – extending can be difficult. Tourist visas can be extended for 30 days (US$35) or 60 days (US$75). If needing a multiple-entry visa or to stay between 30 and 90 days, you can apply for Visa Application Authorisation online before arrival.
Land-Border Arrivals From Indonesia
All nationalities (other than Indonesian and Portuguese nationals) must apply for a Visa Application Authorisation prior to their arrival at the border – apply in person at a consulate (there's one in Kupang, though it's not always open) or via the Immigration Service’s website (http://migracao.gov.tl) and they'll email you a printable authorisation letter in about ten working days. You need to present this and the US$30 fee at the border.